气候变化领域集成服务门户(CCPortal): An elastic-plastic model for frozen soil from micro to macro scale

CCPortal

DOI	10.1016/j.apm.2020.09.039
	An elastic-plastic model for frozen soil from micro to macro scale
	Wang, Pan; Liu, Enlong; Zhi, Bin
通讯作者	Liu, EL (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0307-904X
EISSN	1872-8480
起始页码	125
结束页码	148
卷号	91
英文摘要	Frozen soil is a multiphase heterogeneous composite, whose mechanical properties are controlled by the different constituent materials properties and the internal breakage mechanism. In response to this issue, a multiscale incremental elastoplastic constitutive model for frozen soil is derived to reflect this internal mechanical mechanism through micro-thermo-mechanics and homogenization theory, which includes two homogenization steps: breakage stage (I step) and constituent materials stage (II step). Firstly, the non linear homogenization process in the first step is transformed into linear homogenization through Hill's linearization method and the incremental constitutive model is given with the elastic/plastic increment strain concentration tensors by the self-consistent theory, which considers the breakage mechanism, and a new method for determining the volumetric breakage ratio is developed by means of thermodynamic theory, which has a more rigorous theoretical framework than previous methods. Secondly, in the second homogenization process, the elastic stiffness tensor of bonded elements, which is composed of unbroken material with elastic properties, is given by M-T method (incremental constitutive model). Meanwhile, the elastical-plastic stiffness tensor of frictional elements is determined by using a new Eshelby's tensor for elastic-plastic medium (incremental constitutive model). Finally, the specific application of this model for frozen soil is given, and the rationality is demonstrated by comparing the computed and tested results under conventional triaxial compression test. (C) 2020 Elsevier Inc. All rights reserved.
关键词	ELASTOPLASTIC CONSTITUTIVE MODEL MECHANICAL-PROPERTIES HOMOGENIZATION STRENGTH BEHAVIOR FIELD
英文关键词	Binary medium model; Multiscale model; Breakage mechanism; Strain concentration tensor; Volumetric breakage ratio; Frozen soil
语种	英语
WOS研究方向	Engineering ; Mathematics ; Mechanics
WOS类目	Engineering, Multidisciplinary ; Mathematics, Interdisciplinary Applications ; Mechanics
WOS记录号	WOS:000606310600008
来源期刊	APPLIED MATHEMATICAL MODELLING
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254164
作者单位	[Wang, Pan; Liu, Enlong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Wang, Pan; Liu, Enlong] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Liu, Enlong] Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Coll Water Resources & Hydropower, Chengdu 610065, Peoples R China; [Zhi, Bin] Xian Univ Sci & Technol, Sch Architecture & Civil Engn, Xian 710054, Peoples R China
推荐引用方式 GB/T 7714	Wang, Pan,Liu, Enlong,Zhi, Bin. An elastic-plastic model for frozen soil from micro to macro scale[J]. 中国科学院西北生态环境资源研究院,2021,91.
APA	Wang, Pan,Liu, Enlong,&Zhi, Bin.(2021).An elastic-plastic model for frozen soil from micro to macro scale.APPLIED MATHEMATICAL MODELLING,91.
MLA	Wang, Pan,et al."An elastic-plastic model for frozen soil from micro to macro scale".APPLIED MATHEMATICAL MODELLING 91(2021).